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  1. Member mats.hogberg's Avatar
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    Somewhere I found a doc describing a flag in the mpeg2 header, that determines if the mpeg is to be displayed as 4:3 or 16:9. Now, I've f*cked up again, and encoded a 16:9 movie with 4:3 aspect ratio. Can anyone refresh my memory as to where in the header this is, and the values for the different ratios? It's a simple thing to alter with a hex editor - much easier than reencoding...

    TIA!
    /Mats
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  2. Hi!
    Pulldown.exe can change aspect ratio.
    Try it.
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  3. I'm a MEGA Super Moderator Baldrick's Avatar
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  4. Member mats.hogberg's Avatar
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    Thanks guys! Actually found the page where I first found the info:

    Open the video stream (m2v) in HexEditor,
    Locate the sequence header 00 00 01 b3 (usually hex address 000)
    Make changes as need, then save.


    0000000: 00 00 01 B3 1E 01 E0 24 00 00 00 00 00 00 00 00

    Horizontal Size in Hex
    16 0 = 352
    1E 0 = 480
    2D 0 = 720
    2E 4 = 740

    Vertical Size in Hex
    0F 0 = 240
    1E 0 = 480

    Aspect Ratio
    1 = 1:1
    2 = 4:3
    3 = 16:9
    4 = 2.211 (not used in dvd)

    Frame Rate
    1 = 23.976
    2 = 24
    3 = 25
    4 = 29.97
    5 = 30
    6 = 50
    7 = 59.94
    8 = 60


    /Mats
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  5. Member vhelp's Avatar
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    Hay guys

    @ mats.hogberg..

    That is great. I too am having my own issues w/ 16x9 views and things.

    I'd like to expand on this, and develop a tiny app that will do this for ya
    (and others) and I was wondering about cooking up something real quick
    under Delphi. If its something soo simple, I could crack something up right
    away ?? (PM me, so this topic doesn't become traffic junk)

    Thanks for any info,
    -vhelp
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